Malicious PDF — malware analysis report

Static analysis result for SHA-256 991e9ed3857d08c2…

MALICIOUS

PDF

97.4 KB Created: 2021-03-18 13:26:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3087feb4d34b226f8d057114f451831f SHA-1: 7e9242283ebd24da6c80bcf381f8c94cdd251924 SHA-256: 991e9ed3857d08c202a20f2098df976e88b5b72231621dd91c153d591aff3cde
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains heuristics indicating it is a phishing lure, specifically mentioning invoice and callback scams. It embeds a URL pointing to a potentially malicious domain, which is a common tactic for delivering further stages of an attack. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Invoice remittance address uses free webmail high SE_INVOICE_FREE_WEBMAIL_REMITTANCE
    Document contains invoice and bank-transfer/payment context, but the remittance or payment contact address uses a consumer webmail domain. This is a strong business-email-compromise indicator.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/wix?keyword=zmodo+zp-ibi13-w+price
    • https://cdn.sqhk.co/lediname/YnNjgXq/zejejunepokomunekulamado.pdf
    • https://cdn.sqhk.co/torujazelome/uJ4xidu/opera_ve_balet_teatri_afisha_oktyabr_2019.pdf
    • http://gilumesu.mypressonline.com/what_is_critical_theory_in_english_literature.pdf
    • http://lubenoredeji.mypressonline.com/how_to_boost_the_left_side_of_your_brain.pdf
    • https://cdn.sqhk.co/kapopajij/2kWhgtD/bejekefe.pdf
    • https://cdn.sqhk.co/vudararemane/z3jfghg/yalghaar_delta_igi_commando_adventure_mobile_game_mod.pdf
    • http://mixezitubut.mygamesonline.org/netters_orthopedic_anatomy_anki.pdf
    • https://cdn.sqhk.co/puzadowoke/jcjfijy/somijediwoji.pdf
    • https://cdn.sqhk.co/vivijuzajus/b5Wjbih/buxerarolot.pdf
    • http://linefofaxugedu.mywebcommunity.org/10904365022.pdf
    • https://cdn.sqhk.co/lesasafo/hxAH3ia/87325224679.pdf
    • http://kuxuvajivor.iblogger.org/english_to_german_dictionary_free.pdf
    • https://cdn.sqhk.co/gevolonovare/i3XKK0J/fire_and_water_3_game_free_download.pdf
    • https://cdn.sqhk.co/zelumevimitu/X77BJgm/arena_gorda_beach_punta_cana_dominican_republic.pdf
    • http://vavesojijakoju.iblogger.org/best_reading_comprehension_books_for_4th_grade.pdf
    • https://cdn.sqhk.co/pefatipi/1IjgCWA/78861905466.pdf
    • https://cdn.sqhk.co/romilononove/igjb1hj/bepukewugi.pdf
    • https://cdn.sqhk.co/kotoweraga/lJjhIVw/complete_digestive_enzymes_walmart.pdf
    • https://cdn.sqhk.co/gevajoke/Ed6ghV2/33418861740.pdf
    • https://cdn.sqhk.co/xoxujagemo/eIRAjhc/nupopubawimaworapikawu.pdf
    • https://cdn.sqhk.co/migefareg/0iahbhc/xutubejokixonoses.pdf
    • http://faripofijukevom.mywebcommunity.org/sony_usb_turntable_software.pdf
    • http:///control/faststream.jpg?stream=MxPEG&needlength&fps=6Other
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lavuradisaxel.epizy.com/tabela_municipios_ibge_2016.pdf
    • http://vabagez.rf.gd/zajoto.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011999.bin
5226c763f3d4f3cbceb38bcb13217c6b3d4a8982263ccab1e51df51dbcfe70e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11999 2900 bytes
font_01_sfnt_off000123ee.bin
2d68dd920babe1f69fd604ccafb294106edeabdabe2343c2039b5617b2416feb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123EE 5284 bytes
font_02_sfnt_off000135f8.bin
131ccc0cffca5c858a460a540bb6ce1ac892e67cafe6932f9666fb17e9bf2e2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135F8 12512 bytes
font_03_sfnt_off00016026.bin
4f5fe7cec457e80e806230e9cb839bc5987c8924ff7362057e91fa7dc855f0bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16026 16364 bytes

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